Charlie Sheen's Highs and Lows

"Charlie’s just done,” People quotes a source on the set as saying. “And he’s quietly telling his friends he’s not coming back.”

According to Access Hollywood, any possibility of his departure would be over money -- not personal issues.

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The star, already the highest-paid actor on television at $987,000 an episode, was asking for $2 million per episode, Access Hollywood reported. He was offered $1.2 million but he turned it down.

If Sheen does leave, it will mark an abrupt end to a successful stint for the actor who has had many highs and lows in his career. Since Christmas, Sheen's private life was been thrown into disarray following an alleged domestic violence incident with his wife.

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Sheen's contract with the show will expire after the April 9th taping and network officials were hopeful the actor would sign on for an eighth season.

"He wants to move on,” a friend of the actor told People. “Leaving is 100 percent his idea.”

His contract will end after the taping of this season's 22nd episode. Stan Rosenfield, Sheen's representative, told People his client's deal is "only through this current season" but would not address the reports of his departure.

A CBS spokesperson said the network doesn't comment on ongoing contract matters.